USN-1837-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-1837-1

linux vulnerabilities

A security issue affects these releases of Ubuntu and its
derivatives:

Ubuntu 13.04

Summary

Several security issues were fixed in the kernel.

Software description

linux
- Linux kernel

Details

An information leak was discovered in the Linux kernel's tkill and tgkillsystem calls when used from compat processes. A local user could exploitthis flaw to examine potentially sensitive kernel memory. (CVE-2013-2141)

A flaw was discovered in the Linux kernel's perf events subsystem for IntelSandy Bridge and Ivy Bridge processors. A local user could exploit thisflaw to cause a denial of service (system crash). (CVE-2013-2146)

An information leak was discovered in the Linux kernel's crypto API. Alocal user could exploit this flaw to examine potentially sensitiveinformation from the kernel's stack memory. (CVE-2013-3076)

An information leak was discovered in the Linux kernel's rcvmsg path forATM (Asynchronous Transfer Mode). A local user could exploit this flaw toexamine potentially sensitive information from the kernel's stack memory.(CVE-2013-3222)

An information leak was discovered in the Linux kernel's recvmsg path forax25 address family. A local user could exploit this flaw to examinepotentially sensitive information from the kernel's stack memory.(CVE-2013-3223)

An information leak was discovered in the Linux kernel's recvmsg path forthe bluetooth address family. A local user could exploit this flaw toexamine potentially sensitive information from the kernel's stack memory.(CVE-2013-3224)

An information leak was discovered in the Linux kernel's bluetooth rfcommprotocol support. A local user could exploit this flaw to examinepotentially sensitive information from the kernel's stack memory.(CVE-2013-3225)

An information leak was discovered in the Linux kernel's bluetooth SCOsockets implementation. A local user could exploit this flaw to examinepotentially sensitive information from the kernel's stack memory.(CVE-2013-3226)

An information leak was discovered in the Linux kernel's CAIF protocolimplementation. A local user could exploit this flaw to examine potentiallysensitive information from the kernel's stack memory. (CVE-2013-3227)

An information leak was discovered in the Linux kernel's IRDA (infrared)support subsystem. A local user could exploit this flaw to examinepotentially sensitive information from the kernel's stack memory.(CVE-2013-3228)

An information leak was discovered in the Linux kernel's s390 - z/VMsupport. A local user could exploit this flaw to examine potentiallysensitive information from the kernel's stack memory. (CVE-2013-3229)

An information leak was discovered in the Linux kernel's l2tp (Layer TwoTunneling Protocol) implementation. A local user could exploit this flaw toexamine potentially sensitive information from the kernel's stack memory.(CVE-2013-3230)

An information leak was discovered in the Linux kernel's llc (Logical LinkLayer 2) support. A local user could exploit this flaw to examinepotentially sensitive information from the kernel's stack memory.(CVE-2013-3231)

An information leak was discovered in the Linux kernel's receive messagehandling for the netrom address family. A local user could exploit thisflaw to obtain sensitive information from the kernel's stack memory.(CVE-2013-3232)

An information leak was discovered in the Linux kernel's nfc (near fieldcommunication) support. A local user could exploit this flaw to examinepotentially sensitive information from the kernel's stack memory.(CVE-2013-3233)

An information leak was discovered in the Linux kernel's Rose X.25 protocollayer. A local user could exploit this flaw to examine potentiallysensitive information from the kernel's stack memory. (CVE-2013-3234)

After a standard system update you need to reboot your computer to makeall the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates havebeen given a new version number, which requires you to recompile andreinstall all third party kernel modules you might have installed. Ifyou use linux-restricted-modules, you have to update that package aswell to get modules which work with the new kernel version. Unless youmanually uninstalled the standard kernel metapackages (e.g. linux-generic,linux-server, linux-powerpc), a standard system upgrade will automaticallyperform this as well.